Add instructions about disabling mcp (#43)

Author: mrubens

docs/advanced-usage/mcp.md

@@ -60,4 +60,33 @@ The file uses a JSON format:
       "timeout": 90
     }
   }
-}
+}
+```
+
+## Disabling MCP Features
+
+Roo Code provides two settings to control the use of MCP servers, to help you manage token usage and security:
+
+### 1. Disable MCP Servers Entirely
+
+If you don't want to use MCP servers at all, you can disable them completely:
+
+1. Open the Roo Code Settings (gear icon ⚙️)
+2. Find the "Enable MCP Servers" setting
+3. Uncheck the box
+
+This will prevent Roo Code from connecting to any MCP servers, and the `use_mcp_tool` and `access_mcp_resource` tools will not be available. This is the most secure option if you don't intend to use MCP.
+
+### 2. Disable MCP Server Creation
+
+Roo Code can be asked to assist in creating new MCP servers. This is a powerful feature, but it also consumes more tokens and could potentially introduce security risks if used improperly.
+
+To disable MCP server creation:
+
+1. Open the Roo Code Settings (gear icon ⚙️)
+2. Find the "Enable MCP Server Creation" setting
+3. Uncheck the box
+
+With this option disabled, Roo Code will not attempt to create new MCP servers. You can still use existing, manually configured servers.
+
+By default, both of these options are enabled.

docs/advanced-usage/rate-limits-costs.md

@@ -46,5 +46,6 @@ If you set the rate limit to 10 seconds, Roo Code will wait at least 10 seconds
 *   **Use Custom Instructions:**  Provide custom instructions to guide Roo Code's behavior and reduce the need for lengthy explanations in each prompt.
 *   **Choose the Right Model:**  Some models are more cost-effective than others.  Consider using a smaller, faster model for tasks that don't require the full power of a larger model.
 *   **Use Modes:** Different modes can access different tools, for example `Architect` can't modify code, which makes it a safe choice when analyzing a complex codebase, without worrying about accidentally allowing expensive operations.
+*   **Disable MCP If Not Used:** If you're not using MCP (Model Context Protocol) features, consider [disabling it in the MCP settings](./mcp#disabling-mcp-features) to significantly reduce the size of the system prompt and save tokens.
 
 By understanding and managing your API usage, you can use Roo Code effectively and efficiently.